MacBook Pro 3,1 - Firewire Bus(ses?), 400 & 800 at the same time

Hi All,
I'm using an RME Fireface 800, which is a FW800 audio interface, but I also have a Maxtor FW400 hard drive.
I know if I daisy-chain the hard drive off the audio interface, then I will drop the bus speed to 400 Mbit/s, but will the same happen if I plug the hard drive into the FW400 port?
I know if I plug something into the FW400 port on my iMac this happens, so everything there is Firewire 800. Should I aim for the same with my MacBook Pro?
Cheers,
Alex

buy something like this:
http://www.siig.com/ViewProduct.aspx?pn=NN-EC2012-S1
they make all different kinds (FW 400, 800, etc.)
plug your camera in either that adapter or your internal FW port
plug your FW drive into the other
capture your video to the EXTERNAL drive.
edit your footage.
you don't say what software you are editing in (FCP, iMovie)

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